> But he figured out how to simultaneously hum and whistle to mimic a dial tone. And there I was, humbly whistling in front of this comment. I managed to humw

> But he figured out how to simultaneously hum and whistle to mimic a dial tone. And there I was, humbly whistling in front of this comment. I managed to humwhistle "11*". Though the detector [0] might have a different accuracy than me. [0] https://nhollmann.github.io/DTMF-Tool/ https://nhollmann.github.io/DTMF-Tool/